Graphs are visual representations of data that help illustrate amounts and relationships. There are several common types of graphs, including pictographs, pie charts, map charts, histograms, bar graphs, and line graphs. Each graph type has distinct features - for example, pictographs use icons to represent quantities, pie charts show data as percentages, and line graphs connect data points with lines. Graphs are useful tools for understanding and analyzing various sets of information.

1. Graphs Using and Understanding Graphs

2. What are Graphs? Graphs are pictures that help us understand amounts. These amounts are called data. There are many kinds of graphs, each having special parts.

3. Parts of a graph

4. Kinds of Graphs Pictograph A pictograph uses an icon to represent a quantity of data values in order to decrease the size of the graph. A key must be used to explain the icon.

5. Kinds of Graphs Pictograph

6. Kinds of Graphs Pie chart A pie chart displays data as a percentage of the whole. Each pie section should have a label and percentage. A total data number should be included.

7. Kinds of Graphs Pie chart

8. Kinds of Graphs Map chart A map chart displays data by shading sections of a map, and must include a key. A total data number should be included.

9. Kinds of Graphs Map chart

10. Kinds of Graphs HistogramA histogram displays continuous data in ordered columns. Categories are of continuous measure such as time, inches, temperature, etc.

11. Kinds of Graphs Histogram

12. Kinds of Graphs Bar graphA bar graph displays discrete data in separate columns. A double bar graph can be used to compare two data sets. Categories are considered unordered and can be rearranged alphabetically, by size, etc.

13. Kinds of Graphs Bar graph

14. Kinds of Graphs Line graphA line graph plots continuous data as points and then joins them with a line. Multiple data sets can be graphed together, but a key must be used.

15. Kinds of Graphs Line graph

16. Kinds of Graphs Line graph

17. Kinds of Graphs Line graph

18. Graphs Using and Understanding Graphs